Lincoln Electric IM575 manual Troubleshooting & Repair

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TROUBLESHOOTING & REPAIR

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Observe all Safety Guidelines detailed throughout this manual

 

PROBLEMS

(SYMPTOMS)

POSSIBLE CAUSES/REMEDIES

3.BLOWER OVER TEMPERATURE a. Airflow restrictions present at load bank intake or exhaust. indicator lights are on, but the

blower is operating.

b. Maximum rating of the load bank may have been exceeded.

4.Fan blade is broken or not turning. a. Fan blade motion may be obstructed.

b.Fan blade may be loose at hub or is not keyed properly.

5.Load step(s) cannot be energized. a. Check to see if over temperature indicator is lit. (See problem 3.)

b.A blower failure may exist. (See problem 2.)

c.Master load switch may be faulty.

d.Control power may be inadequate.

e.Fuse may be blown in load bank control circuit. (Check and replace as required).1.

f.Load step switch may be faulty.

g.Load step contactor may be inoperative.

h.Load step resistor may be open.

i.Output polarity connection is incorrect. Verify correct polarity connection to the load bank.

1.When checking fuses for continuity, be sure to remove all fuses from clips (in fuse block or disconnect switch). Test each fuse individually, out of circuit.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.

MASTER LOAD 750

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Contents Master Load Welding Equipment Safety California Proposition 65 WarningsElectric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Sûreté Pour Soudage a L’ArcLoad Bank Safety Thank You Table of Contents Technical Specifications Master Load DescriptionSafety Precautions General DescriptionInstallation Before InstallationPower Requirements LocationOperation Purpose and USE of ControlsLoad Bank Operation Operating InstructionsMaintenance Routine and Period MaintenanceTroubleshooting & Repair HOW to USE Troubleshooting GuideProblems Symptoms Possible CAUSES/REMEDIES Troubleshooting & Repair Troubleshooting & Repair Diagrams Masterload 750 Wiring DiagramMasterload 750 Dimension Print Masterload 750 General Assembly PartsDescription QTY Item Description Page Page Page Precaucion Warnung